Set of scores ranges from a high of x = 72 to a low of x = 28. if these scores were put in a grouped frequency distribution table, what would be the best choice for the interval width?
Choosing an appropriate intervals is essential when constructing frequency distribution tables. Most frequency distribution tables have about 6 to 15 classes, equal class intervals, and the starting point of each class should be divisible by the class interval and each observation must fit in only one class. Therefore, in this case, a class interval of 5 points will be most appropriate, such that with a range of about 50 we get 10 classes, starting with a class of 25-30, and so on.
